Specific features of nucleophilic substitution in 1-chloro-3,4-dinitrobenzene
作者:N. V. Zotova、P. M. Kushakova、V. A. Kuznetsov、A. A. Rodin、A. V. Garabadzhiu
DOI:10.1007/s11178-005-0043-z
日期:2004.10
Effects of the solvent, temperature, and nucleophile nature on the selectivity of nucleophilic substitution in 1-chloro-3,4-dinitrobenzene were studied, and optimal conditions were found for the synthesis and isolation of particular products.
In order to determine the optimum size of heterocycle of lead compound 1 (6-methyl-3-phenethyl-3,4-dihydro-1H-quinoline-2-thione; IC50=0.8 μM) for inhibition of melanogenesis, we have synthesized and evaluated some benzimdazole-2(3H)-thiones 5a—e. The preliminary bioassay has shown that the benzimdazole-2(3H)-thione motif of 5 is essential structural unit for their inhibitory activity. Among all thiones 5a—e, the compound 5d strongly inhibited the formation of melanin with IC50 value of 1.3 μM.